The "script" is probably just the file itself. Anim8or files are in plain text so your home computer might be opening them in notepad or something. Opening these files in Anim8or on any computer should work.

right click the file and say "save file as" or whatever the equivalent is in your browser.As Ensoniq5 said, Anim8or files are plain text files, therefore your browser opens them as such and simply shows text. Right click and save to your computer so you can open them, and make sure you save them with a .an8 extension at the end.